This is the 10313th most frequent Japanese word.
飛び込む
To jump or dive into.
The word '飛び込む' is used literally here to describe the action of diving or jumping physically into an actual space, like a pool.
彼は泳ぐ前にプールに飛び込む準備をした。
He prepared to dive into the pool before swimming.
The word '飛び込む' is employed metaphorically to represent immersing oneself in an endeavor or new situation.
彼女は思い切って新しい仕事に飛び込んだ。
She boldly dove into the new job.
The word '飛び込む' is used figuratively to illustrate the concept of something abruptly entering one's consciousness or awareness.